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Apr. 10, l923 A. SUNDH ET AL INDICATOR Original Filed Oct. 8, 1920 Patented Apr. 10, 1923.

UNITED STATES PATENT OFFICE.

AUGUST SUNDH, 0F HASTINGS-UPON-HUDSON, NEW YORK, AND WILLIAM WESTER- MAN, OF DETROIT, MICHIGAN.

INDICATOR.

Original application iled October 8, 1920, Serial No. 415,512. Divided and this application led December 24, 1921. Serial No. 524,620.

To all whom it may concern:

Be it known that we, AUGUST SUNDH, a citizen of the United States, and a resident of Hastings-upon-Hudson, county of Westchester, and State of New York, and WIL- LIAM WEs'rERMAN, a citizen of the United States, and a resident of Detroit, county of Wayne, and State of Michigan, have invented certain new and useful Improvements in Indicators, of which the following is a specification.

This invention lrelates to a device to be a plied to mills for indicating the travel ci) a moving part of the mill, the device also being adapted to indicate the amount of material passing through the mill at any time.

In general, the invention relates to a de vice particularly ada ted for application to a rolling mill, an ob]ect of the application of this device to a rolling mill being to indicate the peripheral travel of a roll of the rolling mill and to indicate also theamount of material .which is passed through the mill.

Another object of the invention is the provision of a device of the character designated which is automatically controlled, means having been provided whereby the device is set in operation by the energization of a relay energized by 'current drawn from the line by an electric motor which is ,em-

, ployed for driving the mill.

A further.`object of the invention is the provision of a device of the character designated wherein the indicating element for indicating the travel of a roll of the rolling mill will be set in operation as soon as the rolls of the mill begin to rotate and wherein the other indicating element if not indicating the amount of material passed through the mill, will remain idle until the material is fed to the mill. v

In the accompanying Vdrawings wherein an embodiment of our invention has been i11ustrated,- A

Fig. 1 shows in part sectional elevatlon the device applied to a rolling mlll;

Fig. 2 is a front elevation ofthe apparatus shown in Fig. 1; Fig. 3 is an enlarged view of the indicat ing element and part of the drivingmeans therefor; and Fig. 4 shows on an enlarged scale a magnetizable element adapted to be driven by a roll of the mill and whichv element constitutes a driving element or both indicating elements.

Referring now to the drawings in detail,- 1 and 2 designate respectively the u per and lower rolls of a rolling mill to w ch o'ur device is applied'. It is to be understood, however, that the device forming the subject-matter of this invention is capable of use with other than rolling mills if desired. Ihe rolls 1 and 2 are supported or rotation 1n side frames 3 and are driven by an electric motor 4, the armature shaft of which carries a small spur gear 5 meshing with a large gear 6 connected in the usual way to the rolls 1 and 2- of the mill.v The motor 4 receives its current from a source of electrical supply 7, the 'circuit fori the motor being controlled by the usual switch 8, resistance 9 having been provided in the motor circuit as is customary. The metal to be rolled is-conveniently supported on brackets 10 at one side oi the machine, the metal here having been designated 11. As pointed out above, however, it is to be understood i that the present invention is not to be limited to the application of our improved device to a mill of this character for rolling metal as obviously the device is applicable to other types of machines.

. Supported by one of the side frames 3 is a casing 12, this casing being supported by brackets 13 and 14 immediatelyv above the upper roll 1 of the mill. Carried within the casing 12 at the upper part thereof in the present instance, are indicating elements 15 and 16 respectively, the indicating element 15 being adapted to register or indicate the peripheral travel of the roll. 1

while-the indicating element 16 is adapted to register or indicate the amount of ma# terial, that is to say. metal 11, paed between the rolls 1 and 2. Inasmuch as the particular type of indicating element, 15 or 16 as the case may be, does not form any part of the present invention weV have deemed itV unnecessary to show the detailsof con-V struction thereof, inasmuch as' any of the well-known forms of indicator now on the market are adapted for use in connection with our device. f

Within the casing 12 and supported by a bracket 17 therein is a rotatable, magnetiza- Y ble element 18 shown on an enlarged scale in Fig. 4. This element is adapted to engage or be engaged by the upper mill roll 1 and rent from the source of power 7 in a manner to drive the indicating element 16.

which will be hereinafter pointed out. The element 18 is provided with a shaft 20 mountedy in bearings 21 and 22 in the bracket 17 this shaft `carryingat one end av rotatable member 23 cooperating with contacts 24 and 25 and carrying at its other end a bevelled ear 26. The gear 26 is in Vconst-ant mesh with a bevelled gear 27 mounted upon a vertically extending shaft 28, this shaft being adjustablevertically, relative to a vertically extending shaft 29 in alinementl therewith and carrying adjacent its upper end bevelled gears 30 and 31. The gear 30 meshes with a bevelled gear 32 carried upon a shaft 33, this shaft carrying one portion of a cone-clutch 34 presently to be described. The gear 31 is in constant mesh with the bevelled gear 35 carried upon a shaft 36, the latter constituting a driving or actuating means for the indicating element 15. The clutch 34 already referred to, comprises two portions 37'and 38, the member 37 being rigidly mounted upon the shaft 33 already referred to, while the member 38 is mounted upon and has longitudinal movement relative to a shaft 39 connected to the indicating element 16 and "adapted to drive the same. The clutch is electrically operated, being provided with a winding 40 which when energized will cause the member 38 to move into clutching position relative to the member 37 so that if at that time the gear 32 and therefore the shaft 33 be rotating the shaft 39 will be driven The winding 40 of the clutch 34 is adapted to receive current from the source of supply 7 and for this reason is provided with contacts 41 and 42 and collector vrings 43 and 44.

The element 18 is adapted to be adjusted with respect to the casing 12 vertically thereof, being secured to the casing by members 45 passing through slots 46 in the bracket 17. 'This adjustment is provided so that the element 18 may always be in .engagement with the mill roll 1. As heretofore pointed out the shafts 28 and 29 are adjustable relativev to each other, being coupled together at 47 so that when the bracket 17 is adjusted either up or down the'shaft 28 will be carried with it. This ensures that the gear trains will always be in mesh and the indicators 15 and 16 drlven.

The wiring for ourv device is indicated in Fig. 1 from which it will beseen that the motor-4 receives its current from a supply 7 .when the switch 8 is closed, the current passing through theV motor from the plus side of the line by way of conductor 48, resistance 9,

tor 57, winding 52 of the relay 53, conductor 54, to the minus side of the line. The winding 19 being energized, the elementV 18 will adhere to the roll 1 of the rolling mill 4so that the latter will drive the former and through the gea-rs 26, 27, 30 and 31 drive the indicating element 15. The circuit for the winding 40 of the clutch 34 is at this time open and therefore the indicating element 16 is not functioning. As soon, however, as the metal 11 is fed to the rolling mill, the increased load on the motor 4 will ,cause the latter to draw an increased current from the line so that the winding 52 of the relay 53 will be sufficiently energizedto cause the relay 53 to function and lift a Contact 58 intoposition to bridge stationary contacts 59 and 60. A circuit for the winding 40 of the clutch 34 will now be closed, which circuit mayv be traced as follows: from the plus side of the line 7 by way of conductors 48, 55, 61, 62 through the winding 40, conductor 63, contacts 59, 58y and 60, and conductor 64 to the minus side of the line. The energization of the winding 40 will cause the member 38 of the clutch 34 to travel into clutching position relative to the clutch member 37 so that the indicating element 16 will now be driven also to register the amount of material .passed through the mill, the drive for this indicating element being from the shaft 20, gears 26 and 27, shafts 28 and 29, gears 30 and 32, through the clutch 34 to the indicating'element. The relay 53 will maintain its f Contact 58 in position to bridge the contacts 59' and 60 so long as the extra load on4 the peripheral travel' ofthe mill roll 1.

From the foregoing it will be seen that we have provided a device adapted to be applied to a mill, which device is capable of registering the travel of a moving part of the mill and which device is, also capable of registering the amountofl material passed through -the mill, the indicating element for registering the travel A of the moving part of the mill, however, being operable independently of the other indicating element.

'This results in a device which is capable at all times of registering the travel of some moving part of the mill and also one capable of registering the amount of material passed through the mill when the same is in operatlon.

It will be apparent also that we have provided a device of the character described in detail wherein the indicating element for registering the amount of material passed through the mill is under the control of the motor by which the mill is driven'and is automatic in its operation.

It will'be obvious also that means have been provided for driving the indicating element whereby no slippage will occur between the mill roll and the element driven thereby which in turn drives the indicators, so that the indicators will always register accurately.

It is to be understood that while we have illustrated herein a particular embodiment of our invention, we are not to be limited to the exact details of structure so illustrated and herein described as obviously changes may be made herein within the 'purview of our invention.

This applic-ation is a division of our co- Eending application, Serial No. 415,512,

led October 8, 1920.

What is claimed as new is:

1. An indicator comprising an indicating element, a drive shaft, a magnetizable device for driving said shaft, and an electrically operated clutch for connecting the indicating element to the drive shaft.

2. An indicator comprising an indicating element, a drive shaft, a permanent vconnection between said indicating element and drive shaft, a second indicating element driven from said drive shaft, and an electrically operated clutch for connecting the last-named indicating element to the drive shaft, the first-mentioned indicating element functioning while the driving means for the drive shaft are in operation, the sec- Adriving means for said indicating elements,

said clutch and magnetizable device receiving their energ from a common source.

4. In an in icating device, the combination of an indicating element, a drive shaft therefor, an. electric clutch for clutching the indicator to the drive shaft, and anv automatically controlled and operated relay for 4controlling the energization of said clutch.

5. In an indicating device adapted to be attached to a mill the combination of a. magnetizable device the circuit of which is controlled by the mill and which device when energized is clutched to the mill a drive shaft operatively connected to said magnetizable device, an indicating element having a permanent connection to said drive shaft and constantly driven thereby, a second indicating element adapted to register the amount of material passing through said mill, an electrically operated and controlled clutch for clutching the last-mentioned indicator to said drive shaft, said clutch being operable only when material is passing through said mill.

This specification signed this 20th day of Dec., 1921. AUGUST SUNDH. This specification signed this 5th day of Dec., 1921.

WILLIAM WESTERMAN. 

